Ottawa, IL Weather Forecast
LaSalle County, Illinois
Live radar, warnings and storm tracking for Ottawa, with free alerts the moment it counts.
The next few hours
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
Free alerts for Ottawa
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Ottawa, IL at a glance
Ottawa is home to about 18,752 people in LaSalle County, across 15 square miles. It ranks 129th by population of 441 places in Illinois with a forecast here. The nearest neighbour with its own forecast is Marseilles, 9 miles away.
- County
- LaSalle County
- Population
- 18,752 2023 est.
- Land area
- 15 sq mi
- People per sq mi
- 1,259
- Forecast point
- 41.3540°N, 88.8234°W
How well can the network see Ottawa?
The nearest Doppler radar is KLOT (Chicago, IL), to the ENE. Its lowest scan passes about 2,800 ft above Ottawa. Close enough to see rotation in the low part of a storm, where tornadoes form. Ottawa is closer to its radar than 53% of US cities.
The closest weather station is KVYS (Peru/Illinois Valley Rgnl). Far enough that current conditions for Ottawa are a reading from somewhere else.
Forecasts near Ottawa
- Marseilles, IL9 mi
- Oglesby, IL14 mi
- LaSalle, IL14 mi
- Streator, IL16 mi
- Peru, IL16 mi
- Spring Valley, IL19 mi
- Mendota, IL20 mi
- Morris, IL21 mi
Elsewhere in Illinois
ChicagoAuroraJolietNapervilleRockfordElginAll Illinois forecasts →